In medieval logic, the most complex kind of supposition. Accounts differ in detail, but the general picture is this. A term has personal supposition in a proposition if ‘its suppositio in the proposition is the same as its significatio’. Personal supposition is of many kinds. If a term refers to a single object, it has discrete supposition, as for ‘Socrates’ in ‘Socrates is mortal’. If it refers, in some way, to a plurality of objects it has common supposition. Common supposition is also of different kinds. ‘Some man is mortal’ is true if some particular man is mortal. ‘Some man’ has discrete supposition. ‘All men are mortal’ is true if every man is mortal. ‘Every man’ has confused supposition. ‘All men are mortal’ is true if each man is this mortal or that mortal or that mortal … ‘Mortal’ has merely confused supposition.